Abrasive wheel



Feb. l0, 1931. RQAMMETER I 1,792,083

ABRAS IVE WHEEL Filed Dc. l0, 1928 y INIENTOR.A JSM im/wsrf?.

ATTORNEYS.

Patented Feb. 10, 1931 UNITED STATES PATENT OFFICE JOHN R. GAMMETER, OF OHIO, ASSIGNOB TO THE GEORGE W. PERKS COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO nBitAsIv-n WrnsnrI Application led December 10, 1928. Serial No. 325,041.

1A the wheel and injuring workmen or destroyin property.

ore particularly the present invention has forits object the substitution of discs of wire for the metal plates and the provision 15, of 'effective procedure and means for securing such wire discs upon the faces of the abrasive wheel. The wire discs provide a simple construction permitting reduction in the diameter of the face plates or discs as 2o the wheel wears in a manner similar to that disclosed in the second-named application referred to above.

The foregoing and other objects of the invention are attained in the abrasive wheel 2B constructions illustrated in the accompanying drawings and described below. It is to be understood that the invention is not limited to the specific forms thereof shown and described.

Of the accompanying drawings,

Fi ure 1 is an elevation of an abrasive whee embodying the invention;

Figure 2 isa section on line 2-2 of Figure 1;

Figure 3 is an enlarged detail portion of the sectional view shown in Figure 2;

Figure 4 is a side elevation, partly broken away, of a modified form of the invention;

F1 re 5 is a diametral section of line 5-5 of Figure 4; and

Figure 6 is an venlarged detail of a portion of the sectionalview shown in Figure 5.

Referring to the drawings, the numeral 10 designates a wheel ofl abrasive material, bonded by a ceramic, rubber or other suitable binder, and which is formed on one or both faces, either during the molding of the wheel or by cutting therein after burning,-

'Vwith grooves preferably spiral in formal tion. The spirals on the opposite faces are while winding so that upon cooling, shrinkage further tightens the wire. The ends ofy the wire are clamped andthe faces of the wheel on which the wire is wound are cemented and layers 13 of tough, plastic material adapted to be cured or indurated, such as rubber or its equivalents including phenolic condensation products or other articial resins or rubber substitutes, are applied to the faces 'of the wheel over the wires. The rubber or equivalent layers are then vulcanized, indurated or cured under pressure to flow about the wire, and into the grooves and interstices in the wheel, causing the wire to be bonded to the surfaces of the wheel.

The wire bonded to the faces of the wheel as disclosed in the present case functions in the manner of the metal plates disclosed in my pireviou's applications referred to in that brea age of wheels so constructed is reduced and when breakage does occur, broken pieces of the wheel are prevented from flying off and injuringv workmen or destroying property. In addition, the wire discs disclosed herein are easily reducible in diameter as the wheel wears since the outer convolutions of the wire can be removed without aifectin of the remaining convolutions ofg theffaces of the wheels.

In Figures 4, 5 and 6, the present invention is shown embodied in a construction including an abrasive wheel 15 and discs comprising preferably spiral wire convolutions 16 held in place by radial interlacin wires 17 and bondedto the faces of the weel 15 by rubber or equivalent layers 18. This eliminates the necessity for the grooves in the faces of the wheels.

Inhuse, the wheel is referably driven in the direction indicated y the arrow in Fligure 1, that is, in the saine direction as that which the wheel would be driven to wind the wire thereon.

It will appearfrom the foregoing that by wire with the bond i the invention, an abrasive wheel is simply and inexpensively, but eplectively, constructed to reduce breakage and increase the safety of workmen and property endangered by breaking of wheels, and that the facing discs for the Wheel'are reducible in diameter when the wheel is worn down close to the discs. The invention, in effect, provides a facing of tough, plastic material cured or indurated onto the Wheel and containing a Wire. reinforcement. Obviously, modifications of the invention other than those disclosed herein maybe resorted to without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

1. An abrasive wheel construction includin an abrasive wheel body formed with splral grooves in its opposite faces, wire convolutions wound while hot in said grooves and permitted to shrink therein, and layers of tough, plastic material cured under pressure over said wire convolutions to bond the wire convolutions to the faces of the wheel.

2. An abrasive wheel construction including an abrasive wheel body formed with spiral grooves in its opposite faces, said grooves being right and left hand spirals with respect to the faces inrwhich they are formed, convolutions of wire in said grooves and layers of tough, plastic material cure under vpressure over said wire convolutions to bond the wire convolutions to the faces of the Wheel.

3. An abrasive wheel construction including an abrasive wheel body formed with grooves in a face thereof, convolutions of Wire in said grooves, and a layer of tough, plastic material cured under pressure over said wire convolutions to bond said convolutions to the wheel body.

JOHN R. GAMIIETER. 

